13 Jan 1973
College Girls: Sex Equation
Nikkatsu Roman Porno
Maruhi sennyû: Gyaku soap tengoku
A university assistant professor spends his days researching. A hidden camera is installed at a reverse soap shop run by a friend of his, and he studies techniques by observing the reactions of female customers...
Top Billed Cast
Koyuki Fuji Kaede Nishihara
Jun Yahagi Maki Hidejima
Kaori Kuwabara Hiroko Machino
Kan'ichi Hiraga Eijiro Kawai
Masahiro Yoshida Wataru Saito
Ryo Kurihara Tetsuji Kajiki
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